... .1-1997MaterialX42,X52,X60,X65,X70,Q235,Q345,10#,20#,45#,12CrMo,15CrMo,SS304,SS321packagingPainting,Caps,Bevel (beveled edges),Bundles or ... -1997 GB /T 9711.3-2005 GB /T 8163Material 20# 45#API J 55/API K55 /API N80 /API L80 /API ... a).Professional manufacturers of steel products with stable company operation.b).Strong ability to help customers in business solution and solving problems ...